Door To Door Marketing The benefit of this type of field marketing is that it can be done on a low budget, it is very cost effective and reaches a larger number of people per within a very short duration, in this short period of time where you have just a few minutes to convince the customers to take interest in your business, just a few minutes to build personal relations through five stages. By attention, interest, desire, conviction and action. Since representatives speak directly to potential customers, they can address concerns instantly and persuade them to make decisions faster.